Histopathology:
MACROSCOPIC DESCRIPTION: "Brain tumour": Multiple irregular pieces of rubbery tan-dark brown tissue. Several pieces of tissue have strips of dura up to 45mm.
MICROSCOPIC DESCRIPTION: The sections show a moderately cellular meningioma with focal infiltration into the attached dura. The tumour forms whorls and fascicles. No sheeting arrangement is seen. The tumour cells have ovoid nuclei with no nuclear pleomorphism. Mitoses are inconspicuous. There is one area of necrosis. A small amount of brain parenchyma is seen and there is no evidence of brain invasion. No evidence of atypical or malignant change is identified.
DIAGNOSIS: Brain tumour: Meningioma (WHO Grade I).